CN104184230A - High-reliability mixed excitation fault-tolerant motor system - Google Patents
High-reliability mixed excitation fault-tolerant motor system Download PDFInfo
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- CN104184230A CN104184230A CN201410460766.8A CN201410460766A CN104184230A CN 104184230 A CN104184230 A CN 104184230A CN 201410460766 A CN201410460766 A CN 201410460766A CN 104184230 A CN104184230 A CN 104184230A
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Abstract
The invention discloses a high-reliability mixed excitation fault-tolerant motor system. The high-reliability mixed excitation fault-tolerant motor system comprises a stator, a rotor, a rotating shaft, permanent magnets, armature teeth, fault-tolerant teeth, armature coils and magnet exciting coils. The rotating shaft comprises a shaft body, clamping columns and protrusions, the clamping columns are evenly distributed on the outer circumferential face of the shaft body, and the protrusions are arranged on the clamping columns. The clamping columns are fixedly inlaid into rotor poles of a rotor pack, and the permanent magnet are wedged between the rotor poles. A permanent-magnet magnetic field is formed by all the permanent magnets, and an electro-magnetic magnetic field is formed by all the magnet exciting coils. Compared with a traditional built-in permanent-magnet synchronous motor, the high-reliability mixed excitation fault-tolerant motor system has the advantages that a magnetism separating bridge is saved, magnetism leakage of the permanent magnets is avoided, mechanical strength of the motor during high-speed operation is improved, and high-reliability operation of the motor is guaranteed; meanwhile, the advantages of being wide in speed governing scope, high in torque/power density, high in efficiency and the like.
Description
Technical field
The present invention relates to a kind of motor, relate in particular to a kind of highly reliable composite excitation fault-tolerant motor.
Background technology
Internal permanent magnet synchronous motor has that torque output is large, speed-regulating range width, power density and efficiency advantages of higher, in many high-grade drives field, is widely used.And in the contour performance driving of New-energy electric vehicle, wind power generation and Aero-Space field, all the reliability of drive system has been proposed to very high requirement.Drive motors is as the core component of drive system, and its performance is the crucial factor that determines whole drive-train efficiency and performance.And current conventional internal permanent magnet synchronous motor still exists permanent magnet demagnetization and excitation regulation difficult problem, and do not consider the fault freedom of motor cannot meet system reliability requirement and fault-tolerant operation ability.
In addition, the general employing of current conventional internal permanent magnet synchronous motor realized every magnetic every magnetic bridge.Effect every magnetic bridge has two: the one, rotor punching is connected into an integral body with sufficient mechanical strength; The 2nd, by the leakage field of the saturated restriction permanent magnet every magnetic bridge position leakage flux.Its shape and size size not only has vital impact to the unloaded magnetic leakage factor of motor, but also has influence on the performance such as starting torque, mechanical strength, rotating speed, processing technology of motor.Every magnetic bridge, need to design to obtain enough wide mechanical strengths when fully bearing high speed operation of motor, but the wide leakage field that can increase permanent magnet every magnetic bridge.Therefore, in conventional internal permanent magnet synchronous motor, relatively difficult every the tradeoff design of magnetic bridge.Based on above-mentioned background, be necessary to develop a kind of novel highly reliable composite excitation fault-tolerant motor system.
Summary of the invention
technical problem:for above-mentioned prior art and deficiency thereof, the present invention intends providing a kind of highly reliable composite excitation fault-tolerant motor system, solve the fault-tolerant operation poor performance, permanent magnet demagnetization and the excitation regulation difficult problem that in traditional internal permanent magnet synchronous motor, exist, save every magnetic bridge simultaneously, avoid the leakage field of permanent magnet, and the mechanical strength in the time of can improving high speed operation of motor, guarantees the highly reliable operation of motor.
technical scheme:for achieving the above object, the technical solution used in the present invention is:
A highly reliable composite excitation fault-tolerant motor system, comprises stator, rotor, rotating shaft, permanent magnet, armature tooth, fault-tolerant teeth, armature coil and magnet exciting coil; Armature tooth and fault-tolerant teeth are uniformly distributed along the circumferential interval of stator inner ring, and the facewidth of armature tooth and the facewidth of fault-tolerant teeth unequal; On armature tooth, be wound with armature coil, for individual layer is concentrated winding, two adjacent individual layers are concentrated between winding and are isolated by fault-tolerant teeth, and the armature coil on two radially relative armature tooths is connected into a phase; Magnet exciting coil is sleeved on stator fault-tolerant teeth, and magnet exciting coil is composed in series a set of single-phase central excitation winding successively from beginning to end; It is characterized in that: described rotating shaft comprises axis body, card column and projection, described card column is distributed on the outer circumference surface of described axis body, and described projection is arranged in described card column; Described card column is bumped in each rotor pole that is fixed to rotor pack, and the permanent magnet between rotor pole described in wedging and permanent magnet top and bottom are without magnetic conductor; All permanent magnets form permanent magnetic field, and all magnet exciting coils form electricity excitation magnetic field.
The footpath that the bearing of trend of described card column is positioned at described axis body makes progress; Described projection is arranged on top or the middle part of described card column.
Total number of teeth of armature tooth and fault-tolerant teeth is the multiple of 2m, and the difference of total number of teeth of armature tooth and fault-tolerant teeth and the number of pole-pairs of permanent magnet is ± 2, wherein, and the number of phases that m is motor.
Described permanent magnet is the setting of " spoke " type in rotor, and the wedge shape of permanent magnet top and bottom is non-magnetic material.
1. described in, stator and rotor pack are silicon steel sheet, iron, cobalt, nickel and alloy thereof.
2. described in, permanent magnet is neodymium iron boron, Rare-Earth Cobalt or aluminium nickel cobalt.
3. described in, rotating shaft is non magnetic beallon.
Motor of the present invention, has retained in structure and performance that traditional internal permanent magnet synchronous motor torque output is large, the advantage such as speed-regulating range width, power density and efficiency height; On excitation mode, adopted two kinds of excitation modes of permanent magnet excitation and electric excitation, solve permanent magnet demagnetization and excitation regulation difficult problem; On rotor structure, saved every magnetic bridge, avoided the leakage field of permanent magnet, and improved motor and run on mechanical strength at a high speed, guaranteed the highly reliable operation of motor, the permanent magnet in rotor is the setting of " spoke " type simultaneously, has poly-magnetic effect, the permanent magnet of special rotor structure and " spoke " type, contributes to further to have improved torque/power density.
beneficial effect:
Compared with prior art, the present invention has following beneficial effect:
(1) adopt redundant electric excitation, when there is demagnetization or loss of excitation fault in permanent magnet, the excitation field that can produce by electric excitation winding, maintain motor rotation, improved the fault-tolerant ability of motor, when motor normally moves, can to realize permanent power wide speed regulation, move by weak magnetic again;
(2) armature winding on stator is centralized winding, end is short, is convenient to install, and there is no the fault-tolerant teeth of winding as flux circuit, realize the isolation in motor circuit, magnetic circuit and temperature field between phase and phase simultaneously, improved reliability and the fault-tolerant operation ability of motor;
(3) adopt special rotor structure, make permanent magnet top and bottom without magnetic conductor, permanent magnetic circuit must form closed-loop path through air gap and stator, thereby between permanent magnet, there is not leakage field, therefore, without using every magnetic bridge restriction leakage flux, improved motor simultaneously and run on mechanical strength at a high speed, guaranteed the highly reliable operation of motor, and the permanent magnet in rotor is the setting of " spoke " type, has poly-magnetic effect, has further improved motor torque/power density and efficiency;
(4) from the angle of design of electrical motor, failure tolerant and the reliability of motor have been considered, mechanical strength while comprising the demagnetization of motor or loss of excitation fault, phase fault or open fault, phase winding fault and motor operation high speed, realize the runnability of the highly reliable and strong fault tolerance of motor, also there is the advantages such as speed-regulating range width, torque/power density and efficiency height simultaneously.
Accompanying drawing explanation
Fig. 1 is electric machine structure schematic diagram of the present invention.
Wherein: 1 stator, 2 rotors, 3 rotating shafts, 301 axis bodies, 302 card columns, 303 projections, 4 permanent magnets, 5 armature tooths, 6 fault-tolerant teeths, 7 armature coils, 8 magnet exciting coils.
Fig. 2 is the rotating shaft schematic diagram in motor of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Be illustrated in figure 1 a kind of highly reliable composite excitation fault-tolerant motor, be specially a three-phase 12 groove/10 utmost point motors, comprise stator 1, rotor 2, rotating shaft 3, permanent magnet 4, armature tooth 5, fault-tolerant teeth 6, armature coil 7 and magnet exciting coil 8.Armature tooth 5 and fault-tolerant teeth 6 are uniformly distributed along the stator 1 circumferential interval of inner ring, and total number of teeth is the multiple (number of phases that m is motor) of 2m, and the facewidth of the facewidth of armature tooth 5 and fault-tolerant teeth 6 is unequal.Non magnetic rotating shaft 3 as shown in Figure 2, comprise axis body 301, card column 302 and projection 303, card column 302 is distributed on the outer circumference surface of axis body 301, projection 303 is arranged in card column 302, card column 302 is bumped in each rotor pole of rotor 2 laminations, firmly be fixed in rotor pole, non magnetic rotating shaft 3 suits completely with rotor 2 laminations, thereby improves mechanical strength.Between rotor pole, wedge permanent magnet 4, be the setting of " spoke " type, have poly-magnetic effect, the wedge shape of permanent magnet top and bottom is non-magnetic material.This special rotor structure makes permanent magnet top and bottom without magnetic conductor, permanent magnetic circuit must form closed-loop path through air gap and stator, thereby between permanent magnet, there is not leakage field, therefore without using every magnetic bridge restriction leakage flux, improve motor simultaneously and run on mechanical strength at a high speed, guarantee the highly reliable operation of motor, and contributed to further to improve motor torque/power density and efficiency.The difference of total number of teeth of armature tooth 5 and fault-tolerant teeth 6 and the number of pole-pairs of permanent magnet 4 is ± 2.
On armature tooth 5, be wound with armature coil 7, for individual layer is concentrated winding, two adjacent individual layers are concentrated between winding and are isolated by fault-tolerant teeth 6, when being provided, plays flux circuit the effect of alternate magnetic isolation, physical isolation, heat isolation and electrical isolation, there is higher reliability and the ability that operates with failure, reduced torque pulsation.In addition, armature coil 701 and armature coil 704 series connection are as A phase winding, and armature coil 702 and armature coil 705 series connection are as B phase winding, and armature coil 703 and armature coil 706 series connection, as C phase winding, make the present invention fundamentally avoid phase fault.
Magnet exciting coil 8 is sleeved on fault-tolerant teeth 6, have 6, comprise magnet exciting coil 801, magnet exciting coil 802, magnet exciting coil 803, magnet exciting coil 804, magnet exciting coil 805 and magnet exciting coil 806, and these 6 magnet exciting coils successively head and the tail are composed in series a set of single-phase central excitation winding, when there is demagnetization or loss of excitation fault in permanent magnet 4, the excitation field that can produce by electric excitation winding 8, maintains motor rotation, has improved the fault-tolerant ability of motor.
Operation principle of the present invention is as follows: this motor produces main field jointly by permanent magnet excitation and two kinds of excitation sources of electric excitation, and in these two kinds of magnetic potential sources, permanent magnet sources is main magnetic potential source, and electric excitation magnetic potential is as auxiliary magnetic potential source.When motor is normally worked, electric excitation magnetic potential mainly rises to be increased or weakens main magnetic circuit flux interaction, realizes motor gas-gap magnetic field adjustable; Owing to adopting special rotor structure, avoided the leakage field of permanent magnet, and improved motor and run on mechanical strength at a high speed, guaranteed the highly reliable operation of motor; When motor generation permanent magnet demagnetization fault, the maximum exciting current that the single-phase electricity excitation winding of motor passes into permission produces excitation field, with armature winding reciprocation, produces enough torques, safeguards system service requirement.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a highly reliable composite excitation fault-tolerant motor system, comprises stator (1), rotor (2), rotating shaft (3), permanent magnet (4), armature tooth (5), fault-tolerant teeth (6), armature coil (7) and magnet exciting coil (8); Armature tooth (5) and fault-tolerant teeth (6) are uniformly distributed along the circumferential interval of stator inner ring, and the facewidth of the facewidth of armature tooth (5) and fault-tolerant teeth (6) is unequal; On armature tooth (5), be wound with armature coil (7), for individual layer is concentrated winding, two adjacent individual layers are concentrated between winding and are isolated by fault-tolerant teeth (6), and the armature coil (7) on radially relative two armature tooths (5) is connected into a phase; It is upper that magnet exciting coil (8) is sleeved on stator fault-tolerant teeth (6), and magnet exciting coil (8) is composed in series a set of single-phase central excitation winding successively from beginning to end; It is characterized in that: described rotating shaft (3) comprises axis body (301), card column (302) and projection (303), described card column (302) is distributed on the outer circumference surface of described axis body (301), and described projection (303) is arranged in described card column (302); Described card column (302) is bumped in each rotor pole that is fixed to rotor (2) lamination, and the permanent magnet (4) between rotor pole described in wedging and permanent magnet top and bottom are without magnetic conductor; All permanent magnets (4) form permanent magnetic field, and all magnet exciting coils (8) form electricity excitation magnetic field.
2. a kind of highly reliable composite excitation fault-tolerant motor system according to claim 1, is characterized in that: the footpath that the bearing of trend of described card column (302) is positioned at described axis body (301) makes progress; Described projection (303) is arranged on top or the middle part of described card column (302).
3. a kind of highly reliable composite excitation fault-tolerant motor system according to claim 1, it is characterized in that: total number of teeth of armature tooth (5) and fault-tolerant teeth (6) is the multiple of 2m, and the difference of the number of pole-pairs of total number of teeth of armature tooth (5) and fault-tolerant teeth (6) and permanent magnet (4) is ± 2, wherein, the number of phases that m is motor.
4. a kind of highly reliable composite excitation fault-tolerant motor system according to claim 1, is characterized in that: described permanent magnet (4) is the setting of " spoke " type in rotor (2), and the wedge shape of permanent magnet (4) top and bottom is non-magnetic material.
5. a kind of highly reliable composite excitation fault-tolerant motor system according to claim 1, is characterized in that: described stator (1) and rotor (2) lamination are silicon steel sheet, iron, cobalt, nickel and alloy thereof.
6. a kind of highly reliable composite excitation fault-tolerant motor system according to claim 1, is characterized in that: described permanent magnet (4) is neodymium iron boron, Rare-Earth Cobalt or aluminium nickel cobalt.
7. a kind of highly reliable composite excitation fault-tolerant motor system according to claim 1, is characterized in that: described rotating shaft (3) is non magnetic beallon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460766.8A CN104184230B (en) | 2014-09-12 | A kind of highly reliable composite excitation fault-tolerant motor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460766.8A CN104184230B (en) | 2014-09-12 | A kind of highly reliable composite excitation fault-tolerant motor system |
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| Publication Number | Publication Date |
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| CN104184230A true CN104184230A (en) | 2014-12-03 |
| CN104184230B CN104184230B (en) | 2017-01-04 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451979A (en) * | 2015-08-05 | 2017-02-22 | 香港理工大学 | Magnetic field modulation hybrid excitation motor |
| CN106712332A (en) * | 2015-08-04 | 2017-05-24 | 香港理工大学 | Wide-speed variable-speed motor with excitation direct-control alternating current-direct current shaft self decoupling |
| CN106787562A (en) * | 2017-01-24 | 2017-05-31 | 东南大学 | Alternately pole, mixed excitation directly drives vernier motor |
| CN106787560A (en) * | 2017-01-20 | 2017-05-31 | 东南大学 | Armature divergence type exchanges mixed excitation electric machine |
| JP2019502353A (en) * | 2016-01-14 | 2019-01-24 | ユニヴァーシティ・オヴ・ニューカッスル・アポン・タイン | Rotor assembly |
| CN112072816A (en) * | 2020-09-28 | 2020-12-11 | 珠海格力电器股份有限公司 | Rotor structure and motor with same |
| CN112564443A (en) * | 2020-12-01 | 2021-03-26 | 东南大学 | Mixed excitation axial magnetic field permanent magnet synchronous motor structure |
| CN113964964A (en) * | 2021-11-15 | 2022-01-21 | 西安热工研究院有限公司 | Permanent magnet demagnetization fault simulation device of permanent magnet wind driven generator based on electric signals |
| CN116207892A (en) * | 2023-05-04 | 2023-06-02 | 成都理工大学 | Mixed excitation motor |
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| US20080143207A1 (en) * | 2006-12-19 | 2008-06-19 | Ge Global Research Center | Fault-tolerant synchronous permanent magnet machine |
| CN102067411A (en) * | 2008-06-16 | 2011-05-18 | 利莱森玛发电机有限公司 | Permanent magnet rotor, and rotating machine comprising such a rotor |
| CN101414775A (en) * | 2008-12-02 | 2009-04-22 | 江苏大学 | Freestanding bi-convex-pole fault-tolerance motor |
| CN102957237A (en) * | 2011-08-22 | 2013-03-06 | 德昌电机(深圳)有限公司 | Brushless motor and motor rotor thereof |
| CN102290883A (en) * | 2011-08-26 | 2011-12-21 | 东南大学 | Redundant excitation double-armature winding multiphase magnetic flux switching motor with fault-tolerant teeth |
| WO2014019641A1 (en) * | 2012-07-31 | 2014-02-06 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Permanent magnet synchronous motor and power-assisted steering system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712332A (en) * | 2015-08-04 | 2017-05-24 | 香港理工大学 | Wide-speed variable-speed motor with excitation direct-control alternating current-direct current shaft self decoupling |
| CN106712332B (en) * | 2015-08-04 | 2019-03-15 | 香港理工大学 | Excitation directly controls ac-dc axis from the wide revolving speed speed regulating motor of decoupling |
| CN106451979B (en) * | 2015-08-05 | 2019-11-19 | 香港理工大学 | Magnetic-field modulation-type mixed excitation electric machine |
| CN106451979A (en) * | 2015-08-05 | 2017-02-22 | 香港理工大学 | Magnetic field modulation hybrid excitation motor |
| US11336137B2 (en) | 2016-01-14 | 2022-05-17 | Advanced Electric Machines Group Limited | Rotor assembly |
| JP2019502353A (en) * | 2016-01-14 | 2019-01-24 | ユニヴァーシティ・オヴ・ニューカッスル・アポン・タイン | Rotor assembly |
| CN106787560A (en) * | 2017-01-20 | 2017-05-31 | 东南大学 | Armature divergence type exchanges mixed excitation electric machine |
| CN106787562A (en) * | 2017-01-24 | 2017-05-31 | 东南大学 | Alternately pole, mixed excitation directly drives vernier motor |
| CN112072816A (en) * | 2020-09-28 | 2020-12-11 | 珠海格力电器股份有限公司 | Rotor structure and motor with same |
| CN112564443A (en) * | 2020-12-01 | 2021-03-26 | 东南大学 | Mixed excitation axial magnetic field permanent magnet synchronous motor structure |
| CN112564443B (en) * | 2020-12-01 | 2021-09-07 | 东南大学 | Mixed excitation axial magnetic field permanent magnet synchronous motor structure |
| CN113964964A (en) * | 2021-11-15 | 2022-01-21 | 西安热工研究院有限公司 | Permanent magnet demagnetization fault simulation device of permanent magnet wind driven generator based on electric signals |
| CN116207892A (en) * | 2023-05-04 | 2023-06-02 | 成都理工大学 | Mixed excitation motor |
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